The Z370 HD3P has four fan headers, which isn't the least we have seen on a Z370 motherboard. All headers are hybrid PWM/DC mode headers, and should all offer up to 1A of current. The fans can be controlled through the UEFI or Windows.

The motherboard uses a pretty common black/gray color theme, which has become much more popular in the past year or two since many users want a motherboard that just fades into the blackness of their case. The back of the motherboard is bare of any components, which is great for handling.

The PCI-E layout is simple enough, the top x16 slot with the metal shielding is connected directly to the CPU. All other PCI-E slots are routed to the PCH, so SLI is not possible. All x1 slots are routed to the PCH, and the x4 slot (looks like x16) is routed to the PCH as well but shares all bandwidth with the M.2 slot right below it. You also get six SATA6Gb/s ports that are connected to the PCH.

We also find two M.2 slots routed x4 PCI-E 3.0. The top M.2 slot supports both PCI-E and SATA drives, but only the bottom one supports SATA based drives.

There are two USB 3.0 internal headers on the motherboard. One is your typical type-A connector, but the other is a type-C internal header. In the lower right corner of the motherboard, we find four boot LEDs, front panel headers, and two USB 2.0 internal headers.

We also have a COM header, an LPT header, and an RGB LED header. The motherboard has heat sinks cooling down all CPU VCore and iGPU phases, and it uses a push pin system to secure the heat sinks to the motherboard, and they seem to be doing a good job.

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